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Thermodynamics: Change in entropy for a heat engine

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A heat engine operates between two reservoirs at T_2= 600K and T_1= 350K. It takes in 1000J of energy from the higher-temperature reservoir and performed 250 J of work. Find the entropy change of the universe and the work that could have been done by an ideal Carnot engine operating between these two reservoirs.

I've tried (Q_h/T_h)- (Q_c/T_c). My answer is incorrect. I come up with 1. something instead of .476 J/K. Can you help?

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Solution Summary

The energy absorbed and work done by a heat engine is given. The change in entropy is calculated.

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The only question is that from where we are gating energy for work to be done? Actually
Energy ...

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